Zipper lock



FIG. 1 is a perspective view showing a zipper lock of my new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is an underside view thereof; and,

FIG. 7 is a rear side view thereof. 

The ornamental design for a zipper lock, as shown. 